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I.HEER. Q THREAD TENSION DEVICE. I No. 605,101. Patented June 7; 1898.

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UNITED STATES PATENT s K. nuns, orv ZURICH, SWITZERLAND.

- THREAD TENSION DEVICE.

SPECIFICATION forming part of Letters Patent No. 605,101, dated June 7, 1898.

Application filed March 30,1897. Serial No. 629,954. (No model.) Patented in France J l 24, 1896,1To. 258,320; in SwitzerlandAugust 26, 1896,N0.12,858; in GermanyAugust 28,1896,N0.92,002; in Italy September, 1896, LV,42,290, and in Austria October 24, 1896, N0. 46/4,2 72.

' 28,1896 in France, No. 258, 320, dated July 24,

1896; in Italy, LV, 42,290, dated September,

1896, and in Austria, No. 46/4,272, dated October 24, 1896.

This invention relates to improved means for use in textile machinery with a View to" the maintenance of the threads at a regulated and uniform tension.

It is a recognized fact that in the manufacture of textile materials the maintenance of the threads at a regulated and uniform degree of tension during the progress of the various operations, particularly those of passing the weft-threads through the fabric by means of a shuttle in a weaversloom, or the winding, threadingg or similar processes to which textile material or fiber is subjected, plays an important part in the attainment of excellence in the quality of the finished product. Many attempts have accordingly been made with a View to bringing thread tension as near to perfection as possible.

The objects of my invention'are to so construct a tension device of the character described that its component parts shall be few in number, and simple in form, and capable of being readily assembled, and that its tension may be readily and easily adjusted. I accomplish these objects by the means hereinafter specified, and set forth more particularly in the claim.

A thread tension device constructed in accordance with the present invention consists, mainly, of a rigid flat bar formed with a guideeye having a gap for the introduction of the thread or threads and a feather-spring adapted to exercise controllable pressure upon the said bar, the saidspring affording the necessary frictional pressure upon the threads which pass through the eye of the bar.

Such being the nature of my invention the following is a complete description of same, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation, and Fig. 2a

.be attached. 5 In the device illustrated in the drawings it is attached to a shank b. The

portion of bar a serving as guide for the thread or threads is straight and has an eye a, for, guiding one or more threads 0 and an open slit a? for admitting the thread or threads to eye a. s

Upon the face of the flat hard the flat spring dis secured, the bar and spring jointly serving to apply tension to'the thread or threads as' they pass between the bar and spring. Where more than one thread is stretched, all

the threads have thus an equal degree of ten-.

sion applied to them.

That portion of bar a;

In order to increase or diminish thedegree of tension, the apparatus is fitted with a regulating or controlling device, preferably consisting of a loop or keeper, such as e, embracing both the bar and the spring and capable of being shifted either backward or forward to the desired extent. When the keeper or runner e is shifted forward, the threads will be stretched more tightly, the reverse result ensuing when it is moved backward.

If where the thread emerges from the eye a the edge of the latter be sharp, the thread is liable to be out or broken, particularly if any comparatively thick or knotty part occur in it. In order to obviate this risk, theside of the bar Ct facing the spring is formed with a curving recess communicating with-eye a, so that the thread reaches the point at which the frictional tension is applied gradually'instead of suddenly. Said curving recess is indicated by a The same extends forward 100 from eye a toward the free ends of spring (Z and bar a. The free end of; said spring is bent in the form of a hook, so as to guard against the runner e becoming detached after the parts have been properly assembled.

Having now particularly described and ascertained the nature of this invention and in what manner the same is to be performed, what I claim is- 111 a tension device for threads, the combination with the rigid bar to having eye a and open slit a", of the flat spring (I secured fixedly at one end and adjustably at the other end to the bar a and the keeper or runner e embracing bar and spring and capable of being shifted along the same, and means for confining said runner in engagement with said bar and said spring, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in the 20 presence of two subscribing witnesses.

ISAK IIEER.

\Vitnesses:

IIERMANN Knzennornn, II. LABBAR'I. 

